1
1
2
2
3
3
4
4
D D
C C
B B
A A
Title
Number RevisionSize
A4
Date: 2013-5-28 Sheet of
File: D:\ \..\ _liyan0526.SchDocDrawn By:
1
P1.0
2
P1.1
3
P1.2
4
P1.3
5
P1.4
6
P1.5
7
P1.6
8
P1.7
9
RST
10
P3.0/RXD
11
P3.1/TXD
12
P3.2/INT0
13
P3.3/INT1
14
P3.4/T0
15
P3.5/T1
16
P3.6
17
P3.7
18
XTAL2
19
XTAL1
20
VSS
21
P2.0
22
P2.1
23
P2.2
24
P2.3
25
P2.4
26
P2.5
27
P2.6
28
P2.7
29
PSEN
30
ALE
31
EA
32
P0.7
33
P0.6
34
P0.5
35
P0.4
36
P0.3
37
P0.2
38
P0.1
39
P0.0
40
VCC
STC89C52
U*
K?
Relay-SPST
Q?
NPN
VCC
GND
1K
R?
220V_VCC
220V_GND
1
2
P?
RELAY_P2.5
RELAY_P2.5
继电器控制电路
12
Y?
XTAL
30pF
C?
30pF
C?
GND
GND
10uF
C?
VCC
10K
R?
GND
RST
RST
RXD
TXD
1
2
P1
电源接口
S0
SW-SPST
1K
R?
VCC
GND
RXD
TXD
1
2
3
P2
下载程序接口
D1
LED1
上电复位电路
主控电路
VCC
S?
SW-PB
S?
SW-PB
GND
SET_P1.0
SET_P1.0
INC_P1.1
INC_P1.1
Q1
9012
Q3
9012
Q4
9012
VCC
P2.0 P2.2 P2.3
CS4
CS2
CS1
Q2
9012
CS3
P2.1
h
g
c
d
e
a
b
f
e
1
d
2
h
3
c
4
g
5
cs4
6
cs1
7
a
8
f
9
cs2
10
cs3
11
b
12
共阳数码管
CS1
CS2
CS4
CS3
数码管显示电路
按键设置电路
LS1
Speaker
GND
VCC
BEEP_P2.7
Q5
PNP
按键蜂鸣电路
1K
R?
BEEP_P2.7
1K
1K
1K
1K
1K
1K
1K
1K
P2.0
P2.1
P2.2
P2.3
a
b
c
d
e
f
g
h
S?
SW-PB
OK_P1.3
OK_P1.3
1K
1K
1K
1K
S?
SW-PB
DEC_P1.2
DEC_P1.2
D2
LED
GND
LED_P2.4
LED_P2.4
